The apartment is very close to bts, only about 20 minutes to Siam. We were on the 5th floor, the room was smaller than we thought but had a very nice view. If you are staying for a long term, prepare your own shower gel, shampoo and softener.
Washing machines are available on all floors, costing 30 baht for one time. When we were there the washing machine on the 5th floor broke and we had to go down to the 4th floor. TV didn't work, not a big deal since we didn't watch TV. Everything is fine except wifi. Wifi was very slow, couldn't load youtube videos so we had to use 4G most of the time.
Jenesis is very friendly. In general, if you stay for a short time and just need a place to sleep, you won't have too many problems